Polymeric binuclear ruthenium complex as efficient electrocatalyst for oxygen evolution reaction

Tiago A. Matias, André L.A. Parussulo, Paola A. Benavides, Robson R. Guimarães, André H.B. Dourado, Marcelo Nakamura, Susana I.Córdoba de Torresi, Mauro Bertotti, Koiti Araki

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


A robust polymeric material constituted by chains of binuclear aqua ruthenium terpyridylphenanthroline complexes connected through benzene ring meta-positions, exhibiting an unusual two electrons and two protons PCET (proton-coupled electron transfer) process and enhanced oxygen evolution reaction (OER) activity, is described. The catalytic active [RuV[dbnd]O] species is generated at potentials more positive than +1.5 V (NHE) in the poly-[{Ru(H2O)(phen)}2(tpy2ph)] film, as confirmed by the rise of the ruthenyl (RuV[dbnd]O) stretching band at 810 cm−1 in the Raman spectrum, and the clear change to a higher activity regime as confirmed by EIS. Faradaic efficiency for OER as high as 39% was achieved at +1.8 V, indicating that poly-[{Ru(H2O)(phen)}2(tpy2ph)] is one of the most active ruthenium terpyridine complexes ever prepared. The synthesis and characterization of the monomeric binuclear [{RuCl(Clphen)}2(tpy2ph)]2+ and its respective [{Ru(H2O)(Clphen)}2(tpy2ph)]4+ aqua complex are also fully described.

Original languageEnglish
Pages (from-to)18-26
Number of pages9
JournalElectrochimica Acta
StatePublished - 1 Sep 2018
Externally publishedYes


  • Binuclear catalyst
  • Electrocatalysis
  • High valence complex
  • Modified electrodes
  • Oxygen evolution reaction
  • Ruthenium complex


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